Webster Garrison makes his return to Stockton after managing the Beloit Snappers in 2018. He previously managed the Ports from 2011 to 2013 and was named "Banner Island Ballpark All-Time Manager" in 2015. Garrison began his coaching career in 1999 with Double-A Midland and this year will be his 21st season as a coach or manager within the A's organization. Prior to coaching, he was a second-round draft pick of the Toronto Blue Jays in 1983 and made his Major League debut with the A's in 1996.

Chris Smith | Pitching Coach

Pitching Coach Chris Smith will enter his first season as a coach, but is no stranger to the Athletics organization. Originally drafted by the Boston Red Sox in 2002, Smith spent time in the Brewers, Mariners, and Padres organizations before signing a Minor League contract that landed him with the A's in 2015. Smith was added to the A's 40-man roster in 2016 and pitched in Oakland during the 2016 and 2017 seasons.

Brian McArn | Hitting Coach

Brian McArn won't be far from where he makes his off-season home in Elk Grove, Calif. McArn was a coach with the Ports last season and from 2011-2012 and 2014-2015 as well. This baseball season will be McArn's 22nd overall as a hitting coach in the Athletics' system. Prior to joining the A's organization, McArn served as the hitting coach for the Single-A Vermont Expos in the New York-Penn League and was an assistant coach at American River Junior College in Sacramento.

Javier Godard | Coach

Javier Godard will serve his first season as a coach this coming year after having played in Vermont for the Lake Monsters the last two seasons. The Venezuelan native was signed as a non-drafted free agent in 2013.

Matt Mosiman | Strength Coach

Shane Zdebiak | Athletic Trainer

From Gimli, Manitoba. Graduated from University of Manitoba in 2009. Worked 2010-2013 with the Winnipeg Goldeyes in the American Association (independent baseball). 2014-2016 with the Seattle Mariners (14-15 in Everett in the Northwest League, 16 in Clinton in the Midwest League). This is Zdebiak's second year with the A's.